JSFiddle - React, Tailwind, and code Playground

HTML

<form method="POST">
    <input type="text" id="textInput1"/>
    <input type="button" value="Add" onClick="return createNode()"/>
    <input type="button" value="Clear" onClick="return deleteNode()"/>
</form>

JavaScript

document.getElementById('textInput1').addEventListener('keypress', function (e) {
    if (e.which === 13) {
        e.stopPropagation();
        e.preventDefault();
        alert('Enter pressed');
    }
});